when i listen to music, it's all i want to hear. Low volumes are a no go for me.
Perhaps when i make it back out to aspen on a weekday and i have a very sparsely populated run, i'll experiment with some music again. Whenever i go for an outdoor or indoor run, i absolutely need some type of music between 170-180 bpm to help me keep cadence for my "barefoot-style" running. (zero drop heel shoes that promote for/mid-foot strike instead of heel strike)